Let m4 decide what to do

Integration of -ng changes. Changes:

- added support for externally built modules,
- improved support for in-tree shared modules,
- fixed diversion bugs,
- configure displays som

Integration of -ng changes. Changes:

- added support for externally built modules,
- improved support for in-tree shared modules,
- fixed diversion bugs,
- configure displays some informative messages,
- faster static build
(libtool isn't used anymore for compiling non-PIC objects),
- dependencies comparable to automake's without requiring GNU make or GCC,
- working make clean for non-GNU makes.

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Workaround for broken trs

Propagate ZTS setting correctly

Separate libpaths into PHP_LDFLAGS, so that we can address them
separately (required for Apache build).

Allow AC_ADD_LIBRARY to append library

Add rpaths to LDFLAGS during configure, drop them later.

Prepend added libraries and separate LDFLAGS handling

Use LIBS instead of EXTRA_LIBS, so that inter-library dependences can
be tested for using standard autoconf macros.

Fix shared mode for gd/xml/mysql extensions.

Define COMPILE_DL_MODNAME, if module is built as dynamic module

Add --enable-experimental-zts

fix typo

- add PHP_BUILD_THREAD_SAFE
- move #undef HAVE_AOLSERVER into its own config.h.stub

Only create regex/Makefile, if we use the bundled regex library

--enable-versioning can now be used with CGI/AOLserver as well. Note that
we do not use versioning per se anymore, but export only the required
symbols.

Improve regex library selection. It lets user specify whether they want
system, apache, or php's regex library by using the --with-regex option.
"php" is the default; if you use --with-apache

Improve regex library selection. It lets user specify whether they want
system, apache, or php's regex library by using the --with-regex option.
"php" is the default; if you use --with-apache in combination with
Apache 1.3.x, the default is "apache".

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- remove extra CPPFLAGS from top-level Makefile
- HSREGEX defaults to what the user wants, but can be changed now internally

(AC_EXPAND_PATH) Expand relative paths completely

Enable selective regex library compilation.

* archive-based convenience libraries completely replaced
with libtool components

* SAPI targets can enable thread-safe mode and define
shared/static/prog

* archive-based convenience libraries completely replaced
with libtool components

* SAPI targets can enable thread-safe mode and define
shared/static/program build target

* all configure scripts use the same config.cache

* phplibdir is $(top_builddir)/modules to avoid
permission problems

* sapi/*/Makefile.inc are gone

* runpath handling cleaned up

* top-level Makefile.in obsoleted through Makefile.am

* --enable-versioning uses libtool's cleaner and more
portable -export-symbols feature

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Fix typo. This caused strange errors when using --with-apxs.

Decent configure speedup. Makefiles are now generated only for the
extensions you are including. Got rid of configure.in.in.
Moved the last Apache-specific files into sapi/apache and made b

Decent configure speedup. Makefiles are now generated only for the
extensions you are including. Got rid of configure.in.in.
Moved the last Apache-specific files into sapi/apache and made both
static and DSO build work again (it still doesn't run properly).

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added AC_SYS_LFS from fileutils

Avoid specifying standard paths. This might result in compiler problems
(see #1937, #2367)